Mine



M. C. A. H. PAPE.

,MINE.

APPUCATION FILED SEPT. 30. 1920.

1 1 333 Patented Mar. 28, 1922.

2 SHEETS-SHEET l- M. C. A. H. PAPE.

MINE.

APPLICATION FILED SEPT. 30, 1920. 1 A1 0,833 Patented Mar. 28, 1922.

' Fly 3.

fin/ 37? 772/- Marw a,

narrate eerie.

MAX cent. AUGUST HERMAN-N Perri, or NEUMn LEn-DIErnrcnsnonr, NEAR KIEL, GERMANY, ASSIGNOR T0 FIRM cennonrr nx'zrmvensnmzscnerr, or HAMBURG,

RMA Y.

, MINE.

v Specification of Letters ratent Patented Mar. 28, 1922. Application filed September 30,1920. Serial .No. 413,883.

(GRANTED UNDER THE PROVISIONS or. THE ACT OF MARCH 3, 1921, 41 STAT. L., 1313.

To all whom it may concern: 7

Be it known that 1, MAX CARL AUGUST 'HE MANN PArn, a citizen of the German Republic, residing at Neumiihlen-Dietrichsdorf, near Kiel, Germany, have invented certain new" and useful Improvements in Mines, (for which I have filed applications in Germany, April 30, 1915; Spain, Dec. 6, 1919; Finland, Dec. 11, 1919; Sweden, Dec. 5, 1919; Italy, June 11, 1920, and Czech0- Slovakia, Feb. 14, 1920,) of which the following is a specification.

VVit-h sea mines adapted to be held at a predetermined depth of submersion by means of an anchorresting .on the bottom of the sea and a Cable connected at one end to the anchor and automatically gripped by a device carried by the mine when the latter ascends to said predetermined depth, there has been eXperienced heretofore the drawback that the cable was subjected to great strain, especially at the point where it was gripped, tending to rupture it, this strain being due in part to the torsional stresses resulting from the turning movement of the mine about its vertical axis when laid out in running water.

According to the present invention the cable is unwound from a drum on the anchor and, passing over a member connected by a swivel to the mine, is attached at its end to the anchor. The drawback noted above of prior constructions is overcome in the present construction by arranging the gripping device to grip the portion of the cable extending from the drum to the member on the mine and not the portion extending from said member to the attached end of the cable. Thus the tractive force resulting from the buoyancy of the mine puts much less strain upon the cable at the point where it is gripped than would be the case if the gripping point were arranged on the other portion of the cable.

In the accompanying drawings, which illustrate, by way of example, one embodi ment of the invention Fig. 1 is a side elevational view of a mine provided with the improved anchoring means according to this invention.

'Fig. 2 is a vertical sectional view of the member carried by the mine over which the cable passes and of the gripping device and its operating means, said view being taken on the line 2-2 of Fig. 8.-

Fig. 3 is a horizontal sectional view ofthe construction shown in Fig. 2.

In the accompanying drawings, like reference numerals refer to like parts throughout the several views.

Referring to the drawings, a minebuoy filled with explosive is shown in Fig. 1, themine being connected with the anchor 2 upon thebottom of the sea by a cable 3 attached-at one end to a screw-eye 4L se cured to the anchor and passing over a pulley 8 connected by a swivel 9 and bail 10 to the mine 1. After passing over the pulley 8 the cable extends to and is wound about a drum'6 also carriedby the anchor 2 and provided with a suitable braking device tending to prevent the mine from ascending too rapidly and causing the cable to be completely unwound from the drum before the automatic gripping device 7 can come into action. The gripping device 7 is arranged to engage the portion of the cable extending from the pulley 8 to the drum 6. Since all the strain comes on that portion of the cable 8 extending from the gripping device 7 over the pulley 8 to the screw-eye l, the portion 5 of the cable may be made from cord or rope of smaller diameter. than the holding portion of the cable in order to reduce cost and economize space of the drum.

The operating means for the gripping device 7'is shown in detail in Figs. 2 and 3 and comprises a hollowcylindrical member 11 on'which the pulley 8 is journaled. The member 11 is closed by a disc 12 as long as the pressure of the water is greater than the tension of the spring 13 located within the hollow member 11 and pressing at one end against a disc 14 integral with a screwthreaded sleeve 15 adjustably mounted on a screw-threaded stem 16 carried by the disc 12. A lever 17 pivoted at 18 is connected at one end by a link 19 with the disk 12 and at its other end by a link 20 to the gripping device 7 which is eccentrically mounted on a short shaft 21 journaled in the pulley housing 22.

The operation is as follows:

The mine 1 will ascend causing its cable 3 to be unwound from the drum 6 until the pressure of the water on the disc 12 is no longer great enough to overcome the tension of the spring 13, whereuponthe spring will move the disc 12 away from the member 11 causing the lever 17 to swing about its pivot 18, thus rotating the gripping device 7 which will he brought into gripping engagement with the cable 3 due to its eccentric mounting. When this happens the mine will not be able to rise further but will be held at a predetermined depth of submersion by the anchor 2 andcable 3. It will be evident that the depth at Which the gripping action will take place can be varied by adjusting the sleeve 15 on its stem 16. 7

Having now described my invention in one of its embodiments, what I claim is:

1. An anchoring attachment for sea mines, comprising an anchor, a cable drum journaledon said anchor, a cable attached at one end to said anchor and at the other end to said drum, an intermediate member suspended from the mine and around which said cable is passed, and a gripping device also suspended from said mine and adapted to grip the cable on that side of said intermediate member on which the cable passes directly from the drum to the intermediate member.

2. An anchoring attachment for sea mines, comprising an anchor, a cable drum journaled on said anchor, a cable consisting of thick section to the anchor, an intermediate member suspended from the mine and around which the thick section of the cable is led, and a gripping device also suspended from the mine andadapted to grip the thick section of the cable on that side of said intermediate member on which the cable passes directly from the drum to the intermediate member.

3. An anchoring attachment for sea mines, comprising an anchor, a cable drum journaled on said anchor, a member suspended from said mine, said cable being attached at one end to the anchor, passing about said member and being wound upon said drum, an eccentrically mounted rotary gripping device carried by the mine and arranged to grip that portion of the cable extending from said member to the drum, and actuating means for said gripping device adapted to be automatically operated when the mine ascends to a predetermined depth of submersion. V 7

In testimony whereof I afiix my signature in presence of two witnesses.

MAX CARL AUGUST HERMANN PAPE.

Witnesses HUBER LAMBRECHT, HANs GLINDMEIER. 

